JPS5880654A - Image formation - Google Patents

Abstract

PURPOSE:To obtain a good image, by using a photoreceptor consisting of a conductive layer, optical conductive layer and insulating layer and giving a uniform exposure on the surface of the photoreceptor after a developing process and making the potential on the surface uniform. CONSTITUTION:A photoreceptor consists of a conductive layer, optical conductive layer and transparent insulating layer from the top and is charged uniformly by a corona discharging device C1 in a process (I) and is subjected to charge in a reversed polarity to the above-mentioned charge in a process (II). The surface of the photoreceptor is subjected to irradiation based on an optical information in a process (III). Herein, D denotes a dark part and L denotes a light part. The surface of the photoreceptor A is developed by a developer of negative polarity in a process (IV). The surface of the photoreceptor carrying a developed image is exposed uniformly in a process (V) and the potential on the surface of the photoreceptor is made uniform. The developed image is transferred on a transferring plate uniformly and easily in transferring processes following thereto.

Description

[Detailed description of the invention] The present invention relates to an image forming method, and specifically relates to an image forming method.

An image forming method that makes it possible to obtain a good transferred image without damaging the surface of the photoreceptor.Using a process that includes an O-corner discharge process and a light information irradiation process, it is possible to obtain a high-contrast image in good quality. However, in forming a Ws image in a process using such a photoreceptor, it is difficult to keep the potential on the round light plate constant during latent II formation IK development. For example, with the Carlson Pro Series, it is possible to attenuate the dark potential and keep the latent image potential constant just by irradiating light, but in the process using the photoconductor described above, It has a transparent insulating gap between the sides, thereby eliminating static electricity and keeping the potential of the bright and dark areas of the photosensitive plate constant. In particular, if the corona discharge wire gets dirty, it may cause uneven discharge.90Therefore, the above 0IInt
In the ``JA process'', when transferring or separating the transfer material after the transfer is performed using a corona discharger, the transfer may be uneven.
1) There is a risk that the separation may become unstable.Moreover, when dealing with the above instability, auxiliary separation means such as air blowing and separation claws may be necessary. 9, which could float and contaminate the inside of the aircraft. On the other hand, the separation claw may damage the surface of the photoreceptor. i. It is a round product made in view of the above points.

This provides a novel and excellent 9III image forming method, which includes the steps of uniformly charging the photoreceptor with a predetermined polarity using the photoreceptor having the present structure, and a step of uniformly charging the photoreceptor *south with a predetermined polarity; and a step of applying a p-discharge.

The process of irradiating optical information, the developing process, and the photoreceptor II! It is characterized by the step of uniformly exposing the photoreceptor to light, and transferring the developed images on the surface of the photoreceptor onto a transfer material.

Hereinafter, the present invention will be explained in detail by way of specific examples, with reference to the drawings.

Photoconductive semiconductors that may be used include polyethylene film, polyurethane resin, and polyethylene cap resin include CDS, 8e, 8e-Te alloy, OPO,
ZnO and amorphous silicon are used.

In the following description of the embodiments of the present invention, a system using cds will be explained.

FIG. 2 is a schematic diagram showing specific steps of the method of the present invention.

In the (1) step, the photoreceptor is uniformly banded to a predetermined polarity (for example, positive) using a corona discharger.

is the power source.　　　　.

(In the assembly process, the surface of the photoreceptor is charged with a polarity opposite to the charged polarity. A corona discharger 0 is used to generate a corona discharge with a polarity opposite to that of the charged polarity.) A power source E is a power source that applies a DC voltage with a polarity opposite to the above to the corona discharger.
Alternatively, a device that applies an AO voltage, and a device 40 that applies a DC voltage polarized to the opposite polarity are used.

In the (ill)th step, the OD which is irradiated based on the light information of the photoconductor I1 is a dark area, and the Ld is a bright area. l#, light information is irradiated by reflected or transmitted light from the original #IO, laser scanning light modulated by video information signal, ORT spot Koto K
An optical element such as an LID element array may also be used.

In the lead process, the surface of the photoreceptor A is negative-containing, and in the subsequent transfer process using an am agent, the me is uniformly 1. Figure 3 shows the surface potential characteristics of the photoreceptor in each of the above-mentioned processes. Figure 4 shows nine specific examples of image formation by carrying out the method of the present invention. In the explanatory diagram of the apparatus, 01 is a photosensitive drum, which has a photosensitive drum having the above-mentioned basic structure on its surface. 〇2.3 is a corona discharger which is moved in the direction of the arrow by a driving means (not shown). A corona discharger 3 performs corona discharge with components of opposite polarity. 04 is an optical information irradiation light. 05 is a developing device, which in the illustrated example provides a negative polarity developer. 06 is an omnidirectional fog light source. o7U
The transfer corona generator provides a corona with a polarity opposite to that of the developer charge. - is a transfer material separation corona discharger, for example,
A corona discharge 09 is a cleaner that cleans the surface of the photoreceptor drum 1 after the transfer is completed. OP is a transfer material. After the transfer is completed, the transfer material is separated and fixed in a fixing device (not shown). In the above-mentioned device, first, primary charging of positive polarity is performed by a corona discharger 2, and then, charging of negative polarity is performed by a corona discharger 3. Alternatively, exposure is performed using light 4 from a light emitting element such as an LED. Therefore, the light is kept constant in the image area of the digital signal (VO).Then, the surface of the photoreceptor drum after 1% development is exposed to -W light by the entire surface exposure 116, and the O toner is attached. Then, the transfer material P is superimposed on the surface of the photoreceptor drum, and a transfer corona is applied by the transfer corona discharger 7. As a result, a toner image is formed on the transfer material. At this time, a good and uniform transferred image is obtained.Next, the transfer material P is separated from the surface of the photoreceptor drum by a separating corona discharger.This separation can also be achieved without disturbing the transferred image. do not have. The Separate Transfer material is fixed by a fixing means (not shown). On the other hand, the surface of the photoreceptor drum after the transfer is completed is cleaned by a cleaner 9 and prepared for use again.0 In the present invention, as described above in detail in the specific example.

Prior to transfer, the potential of the photoreceptor *m can be made uniform, enabling good image formation.

Moreover, the formed image based on the present invention does not become uneven or disordered during transfer or separation.

- Since there is no risk of damaging the surface of the photoconductor, it can be used repeatedly for a maximum period of time.

[Brief explanation of the drawing]

Figure 1 shows a schematic diagram of the photoreceptor structure used in the present invention.
) Figure 2 is a schematic diagram showing a specific process of the present invention, Figure 3 is a diagram showing the photoreceptor surface potential characteristics of the next process, and Figure 4 is an explanatory diagram of a specific example device based on the present invention. . In the figure, 1; photosensitive drum 52s3; corner discharger, 4
;Optical information irradiation light, 5;Developing device, 6;Full surface exposure source 0

Claims (1)

[Claims] (1) A step of uniformly charging the surface of the photoreceptor with a predetermined polarity using a photoreceptor having a basic configuration of a conductive station, one light guide station, and an insulating space; 1. A step of irradiating optical information; An image forming method 0 characterized by comprising: a step of uniformly exposing the surface of the photoreceptor to light; and a step of transferring the developed images on the surface of the photoreceptor onto a transfer material.